BP's plans called for a 2,200-foot-long pier to be built off Logan Township in New Jersey.
The project was the focus of a U.S. Supreme Court fight between Delaware and New Jersey that was resolved earlier this year in Delaware's favor. Delaware wanted to stop the project because of safety concerns. New Jersey argued that each state controls piers on its side of the river.
The court ruled in March that Delaware has a veto power over developments that extend into its borders on the river.